<div class="ID">
    <div class="ID__upper">
        <table></table>
    </div>
    <div class="ID__middle">
        <button class="btn btn-info btn-sm" type="button"><span class="glyphicon glyphicon-chevron-up"></span></button>
        <button class="btn btn-info btn-sm" type="button"><span class="glyphicon glyphicon-chevron-down"></span></button>
    </div>
    <div class="ID__lower">
        <table></table>
    </div>
</div>